ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,546,847, issued on Feb. 10, was assigned to WHEERE (Montpellier, France).
"System and method for positioning at least one mobile receiver" was invented by Antoine Carrabin (Paris), Pierre-Arnaud Coquelin (Riviere sur tarn, France) and Stephane David-Grignot (Prades-le-Lez, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a system (1) for positioning at least one mobile receiver (2), comprising at least two stationary transmitter bases (4, 4A, 4B). Each transmitter base (4, 4A, 4B) is configured to transmit radio frequency signals (S1A, S1B, sdA, sdB, srA, srB) and to transmit a sum (S1A, S1B) of at least two unmodulated pur...